Google Git
Sign in
android / platform / external / libyuv / 899bc483
commit899bc483273331429b7297dfe4f34f10334afa11[log] [tgz]
authorGeorge Steed <george.steed@arm.com>Thu May 16 17:14:02 2024 +0100
committerFrank Barchard <fbarchard@chromium.org>Mon Jul 08 20:27:54 2024 +0000
tree37e3f47673ab9b0e7b84eff79d2c7346d8c2397e
parent5236846b648418089d9d88b797ed1b7a5e03e907 [diff]
[AArch64] Add SVE2 implementations of ARGBTo{RAW,RGB24}Row

There is no nice way of forming the TBL permute indices here since we
are operating on sets of three bytes at a time, so instead load the
appropriate indices from a static array. We can make use of SVE
predication to ensure we are operating on a multiple of three bytes for
the load/store instructions rather than needing to make use of more
expensive LD4 or ST3 instructions.

Reduction in runtime observed compared to the existing Neon
implementations:

            | ARGBToRAWRow | ARGBToRGB24Row
Cortex-A510 |       -50.8% |         -19.9%
Cortex-A720 |       -39.8% |         -39.1%
  Cortex-X2 |       -66.5% |         -51.9%

Bug: libyuv:973
Change-Id: Iaead678715a3d70d54cf823391272a6196836769
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5631544
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
3 files changed
tree: 37e3f47673ab9b0e7b84eff79d2c7346d8c2397e
  1. build_overrides/
  2. docs/
  3. include/
  4. infra/
  5. riscv_script/
  6. source/
  7. tools_libyuv/
  8. unit_test/
  9. util/
  10. .clang-format
  11. .gitignore
  12. .gn
  13. .vpython
  14. .vpython3
  15. Android.bp
  16. Android.mk
  17. AUTHORS
  18. BUILD.gn
  19. CM_linux_packages.cmake
  20. CMakeLists.txt
  21. codereview.settings
  22. DEPS
  23. DIR_METADATA
  24. download_vs_toolchain.py
  25. libyuv.gni
  26. libyuv.gyp
  27. libyuv.gypi
  28. LICENSE
  29. linux.mk
  30. OWNERS
  31. PATENTS
  32. PRESUBMIT.py
  33. public.mk
  34. pylintrc
  35. README.chromium
  36. README.md
  37. winarm.mk
README.md

libyuv is an open source project that includes YUV scaling and conversion functionality.

  • Scale YUV to prepare content for compression, with point, bilinear or box filter.
  • Convert to YUV from webcam formats for compression.
  • Convert to RGB formats for rendering/effects.
  • Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
  • Optimized for SSSE3/AVX2 on x86/x64.
  • Optimized for Neon on Arm.
  • Optimized for MSA on Mips.
  • Optimized for RVV on RISC-V.

Development

See Getting started for instructions on how to get started developing.

You can also browse the docs directory for more documentation.